Yesterday, I loaded the new 1.20 firmware onto my DCS-2230 cameras.
The D-Link USA site (http://www.dlink.com/us/en/business-solutions/ip-surveillance/business-ip-cameras/cube-cameras/dcs-2230-full-hd-wireless-day-night-camera) lists these enhancements:
Fixed UPnP GPL open source issue
(memory overflow)
Remove Guest account
Enhance codec performance
Enhance camera throughput
Change RTSP authentication default
setting (from Core Security)
The D-Link Taiwan site (http://tsd.dlink.com.tw/) shows these enhancements for 1.20:
New Feature
V1.20.00
1. Add SNMP function
Problems Fixed
V1.20.00
1. Remove guest account.
2. RTSP authentication default enable
3. Fixed the security of UPNP.
So far, I notice that the motion on my cameras is a little bit more smooth. I'm running in 720p mode with Surveillance Center on the DNS-325.
Also, when viewing the cameras with Firefox and Quicktime, cameras have both video and audio, and the playback starts a lot more quickly compared with the 1.10 firmware.
HTH
wylajb